US2935463A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing catalysts and method for catalytic cracking
Assignee: Filtrol Corp
•
Filing: 1956-07-26
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Granted: 1960-05-03
•
Expires: 1976-07-26
Abstract
No abstract record available.
Inventors
- 👤 Robert B Secor
- 👤 Edward S Peer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:48
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/16; B01J21/02; B01J21/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A CRACKING CATALYST CONSISTING ESSENTIALLY OF A SUBSTRATE AND ALUMINA, SAID ALUMINA DERIVED FROM HYDRATED ALUMINA FORMED BY PRECIPITATION FROM A SALT OF ALUMINUM IN AN AQUEOUS SOLUTION HAVNG A PH IN EXCESS OF 10 AND CONTAINING FREE AMMONIA IN AN AMOUNT EQUIVALENT TO AT LEAST ABOUT 1% BY WEIGHT OF THE SOLUTION DURING THE ENTIRE PERIOD OF SAID PRECIPITATION, AND SAID HYDRATED ALUMINA CONTAINING ALSO SULFATE IN AMOUNT RANGING FROM ABUT 0.5 TO LESS THAN 10% CALCULATED AS SO3 BASED ON AL2O3 CONTENT OF SAID HYDRATED ALUMINA.
Claim 2
Dependent Claim
88 words
A CRACKING CATALYST CONSISTING ESSENTIALLY OF A SUBSTRATE AND ALUMINA, SAID ALUMINA DERIVED FROM HYDRATED ALUMINA FORMED BY PRECIPITATION FROM A SALT OF ALUMINUM IN AN AQUEOUS SOLUTION HAVNG A PH IN EXCESS OF 10 AND CONTAINING FREE AMMONIA IN AN AMOUNT EQUIVALENT TO AT LEAST ABOUT 1% BY WEIGHT OF THE SOLUTION DURING THE ENTIRE PERIOD OF SAID PRECIPITATION, AND SAID HYDRATED ALUMINA CONTAINING ALSO SULFATE IN AMOUNT RANGING FROM ABUT 0.5 TO LESS THAN 10% CALCULATED AS SO3 BASED ON AL2O3 CONTENT OF SAID HYDRATED ALUMINA.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-03 | 1963-11-02 | 1964-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-03 | 1967-11-02 | 1968-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-03 | 1971-11-02 | 1972-05-03 | $7700.00 | Window Closed / Lapsed |